CVE-2026-102049
8.8HighPublished 14 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-121
Impact
Adjacent unauthenticated attackers can execute arbitrary code with root privileges or crash the system by sending malicious LLDP traffic. They only need adjacent layer-2 network access to an interface configured with Unified Access Policy.
Root cause
A stack-based buffer overflow in the l2cpd process mishandles incoming LLDP packets.
Affected systems
Juniper Networks Junos OS and Junos OS Evolved; specific version numbers are not listed — check vendor advisory JSA112187.
CVSS v3.1 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Upgrade to the fixed Junos OS/Junos OS Evolved release referenced in JSA112187. As an interim workaround, disable Unified Access Policy or disable LLDP on untrusted, adjacent interfaces.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
A Stack-based Buffer Overflow vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service or execute arbitrary code with root privileges via LLDP traffic received on an interface with Unified Access Policy enabled.